43552121 has 4 divisors (see below), whose sum is σ = 43937652. Its totient is φ = 43166592.

The previous prime is 43552099. The next prime is 43552141. The reversal of 43552121 is 12125534.

43552121 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 9388096 + 34164025 = 3064^2 + 5845^2 .

It is a cyclic number.

It is not a de Polignac number, because 43552121 - 2⁶ = 43552057 is a prime.

It is a super-3 number, since 3×43552121³ (a number of 24 digits) contains 333 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (43552141) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 192596 + ... + 192821.

It is an arithmetic number, because the mean of its divisors is an integer number (10984413).

Almost surely, 2^43552121 is an apocalyptic number.

It is an amenable number.

43552121 is a deficient number, since it is larger than the sum of its proper divisors (385531).

43552121 is a wasteful number, since it uses less digits than its factorization.

43552121 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 385530.

The product of its digits is 1200, while the sum is 23.

The square root of 43552121 is about 6599.4030790671. The cubic root of 43552121 is about 351.8328908277.

Adding to 43552121 its reverse (12125534), we get a palindrome (55677655).

The spelling of 43552121 in words is "forty-three million, five hundred fifty-two thousand, one hundred twenty-one".